Apocalypse How /
Class 6

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Thanos: Where do you think he brought you? Strange: Let me guess. Your home. Thanos: It was. And it was beautiful. Titan was like most planets; too many mouths, not enough to go around. And when we faced extinction, I offered a solution. Strange: Genocide? Thanos: At random. Dispassionate, fair — to rich and poor alike. They called me a madman... and what I predicted came to pass.

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Planetary-scale Total Extinction of all life of any kind. The planet is left as a lifeless husk.

Examples:

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Anime and Manga

The great fear of humanity in Neon Genesis Evangelion is Third Impact, which will complete the devastation of the Class 4 Second Impact. End of Evangelion ended with Third Impact and the resulting extinction of all Lilim (i.e. humanity and all other Earth species) via an Assimilation Plot, but it is outright stated to be reversible, and humans can exist as individuals again, if they really want to.

In Tengen Toppa Gurren Lagann, the Anti-Spiral's defense system sets the Moon on a collision course with the Earth. Our heroes calculate that the impact will strip away the earth's crust, causing everything to die: if not from the impact, then from the superheated gasses released. It would cause the earth to become completely uninhabitable for at least a full year. Our heroes save the day, of course.

This is what's going to happen to the Magical World (population: 1.2 billion) unless the heroes prevent it in Mahou Sensei Negima!. Specifically, when the magic sustaining the world (which is on Mars in Another Dimension) fails, the entire population will be dropped onto the very much uninhabitable surface of Mars. Did I say entire population? I meant 67 million because all of the natives of the Magical World are part of the same spell and don't actually exist apart from it.

In Puella Magi Madoka Magica, this is how Kriemhild Gretchen, the witch form of Madoka, would have destroyed the world in one timeline, or really, any timeline after the point at which the collective despair of all the iterations of her in alternate timelines built up to a sort of critical mass.

It's revealed this was the fate of Earth in the Sixth Universe as the whole planet was rendered uninhabitable by strife and petty warfare. However in an ironic twist, after obtaining the Super Dragon Balls, God of Destruction Beerus instructs his attendant Whis to wish that the Earth of Universe 6 and its inhabitants be restored, giving his brother Champa an Earth of his own, though in order to protect his reputation as a God of Destruction, Beerus hides the nature of his wish.

Near the end of the Future Trunks Arc, Zamasu, now having transcended into a multiversal Eldritch Abomination proceeds to unleash a devastating wave of destruction upon the entire world, when the heroes awaken after it has transpired, the whole planet, along with its inhabitants, have been reduced to a desolate barren wasteland.

This is what ultimately happens to the world in Wolf's Rain. That is, before Kiba dies and Cheza's seeds create paradise to press the reset button for life on Earth.

In Heartcatch Pretty Cure, the main Big Bad Dune does this after defeating the heroines, restoring his full powers, reducing the Great Heart Tree to a withered husk and unleashing his Desert Devils on the Earth, reducing it to a lifeless desert. Thankfully, the people purified by the Precures during the course of the series give the girls the strength to fight back and they reverse this in the end.

In Bleach, Yamamoto's Zanka no Tachi is indicated to be a Class 6; both Yamamoto and Unohana state that Soul Society would be destroyed by the former's Bankai if it was left activated for too long.

In Astra Lost in Space, a meteorite hit Earth, causing it to wipe out all life on the planet. The debris from that impact shaded sunlight to the point where the planet became completely encased in ice, sometime before the start of the story.

Audio Plays

In Guiders of our Dreams, Eclipse, the villain destroys the atmosphere of Earth, and creates a new planet called Skiya.

Comic Books

Long before Malefic (who only managed a Class 3) rolled around in modern continuity, Commander Blanx did this to Mars in the 1969 Justice League of America and Martian Manhunter story "And So My World Ends," setting the entire planet on fire with an ever burning Blue Flame that consumed everything down to the bed rock.

The ultimate consequences of Bishop's actions (and sundry unrelated disasters) in the bad future in Cable and X-Force qualifies as this grade of Apocalypse How (either that or a Class 5). Let's see—he stole a number of WMDs. One of them nuked Australia. Another turned South America into a perpetual conflagration. Nerve gas or something like it released in Beijing depopulated Asia. Africa's fate is uncertain. The fifth of them destroyed Europe's fresh water. The sixth was used against Cyclops when X-Force captured him and brought him to San Fran or Utopia in the Present. In response to one or more of the first five (they all happened in different years), the remains of future-UN declared open colonization on North America. In retaliation, the remains of future-US's government and military turned themselves into roach-people. Cue genocidal war (Cable volume 2 issue 9 or thereabouts). North America was ruined. It had recovered a little by the end of the 30th Century, at least around NYC and up into the Adirondacks a little (Cable and X-Force crossover Messiah War, when Hope was about 9). But, by the 3120s (later issues of Cable), even there, the planet was dying (storms of blood). And what did Bishop have done to him? Cable or Hope (who was by that time about 16) scrambled his time-travel device and sent him to 6900 AD or so in that timeline. That possible future Earth was basically utterly dead. Nice Job Breaking It, Villain.

The final prediction in Knowing. A massive solar flare incinerates the planet, instantly vaporizing everybody on it to a crisp, evaporating the oceans, reducing the surface to lava, and basically just ending all life on Earth, and ensuring it will never rise again for a few million years. Good thing the Sufficiently Advanced Aliens had spares.

This happened to Thanos's home planet Titan as revealed in Avengers: Infinity War. Thanos claims that an Overpopulation Crisis caused the extinction event, but Peter (Quill) notes that the planet itself is off its axis and that gravitational pull is "all over the place", indicating that a lack of resources wasn't the only reason for Titan's demise.

Literature

The Road by Cormac McCarthy has lone bands of dying humans roaming the cold, gray, ash covered America, barren of all animal, insect or plant life. It is implied that once the last few survivors have cannibalized each other, there will be no life on Earth.

In Alastair Reynolds' Century Rain the Earth has been taken over by nanotechnology gone amok, and the remaining humans live in space.

Hinted at in The Body Snatchers, by Jack Finney, when a Body Snatcher who's taken over the body of a friend states that the Body Snatchers only live five years, cannot reproduce and pretty much copy everything living, thereby turning whatever planet they invade (Mars and the Moon are mentioned) to lifeless blobs before launching off to seek out other living planets.

David Drake's The Lord of the Isles series has several examples of this. In "The Gods Return" we get a glimpse of the The Worm's, a giant slug-like monster's, home planet. All life, including all other members of the Worm's species, has been consumed by the monster leaving only a barren grey wasteland behind. Another novel features the Pack, a trio of life-consuming monsters from another plane of existence who have turned their whole universe into a barren desert. In "Mistress of the Catacombs" the main characters eventually wind up in an alternate-universe version of their own world where the Ragnarok apocalypse from Viking myth has occurred. While some humans still survive, one character from the doomed planet, makes it clear there are only months left until the final human is killed by a rampaging giant or other monster and the whole world is covered with ice.

The Star Wars Expanded Universe has the Republic, Separatist, and Imperial Order Base Delta Zero, an orbital bombardment which comes in two main flavors. The quick and dirty version is a Class 3 that involves destroying all cities, industrial assets, infrastructure and people, and can be executed by handful of Star Destroyers in a single day barring resistance and may include surface landings to conduct mop-up operations. The second variant is Class 6, frequently cited as calling for a fleet of ships to melt the planet's crust to a depth of 1 meter. Ultimately, how much it falls between these two categories depends on how many fleet assets are available, how pressed for time the commander in charge is, and how vindictive he is feeling when carrying out the order.

One of Alan Dean Foster's Humanx Commonwealth universe novels, Bloodhype, features the Vom, an Eldritch Abomination of possibly extragalactic origin that travels through space by enslaving sentient species and devours all life on planets it encounters down to the last microbe. Other novels in the series upped the ante - see the X-2 and X-4 entries.

Hyperion Cantos - The Pax orders this being done to the Ousters. A Hegemony officer predicts the Ousters are going to do this to a planet, although there is no evidence they ever did.

Peter F. Hamilton's The Night's Dawn Trilogy contains a planet called Garissa. Or rather, did. It was sterilised with antimatter-fueled "planet busters". In effect, they caused planet-wide radioactive hurricanes that would rage for centuries.

Iar Elterrus' Burden of the Emperor describes the summoning of an Eldritch Abomination roughly described as the embodiment of void or nothing. A successful summoning would wipe out all life, and there is no way to know if the planet would survive the ordeal, placing this on top of Class 6 bordering Class X-1. As of the third book, there is either more than one inhabited planet in the universe or more than one universe with human life, reducing this to Class 0 bordering Class 1, as the planet in question is fairly unique.

Valentin Ivashchenko's Warrior and Mage series feature the Fallen God seeking for a way to reenter the world. Said reentry would possibly destroy the world and surely wipe out life, placing this between Class 6 and Class X-1. Mages in danger of becoming one of those reentry points (usually necromancers under great stress and catastrophic circumstances) are handled with extreme prejudice.

Vadim Kazakov's Measure of Chaos series features a "Well of Chaos" corrupting the land. The corrupted area is quarantined by mages and special multinational armies. A breach in the quarantine will wipe out life, replacing it with chaos-spawned things.

In H. P. Lovecraft's sonnet "Fungi From Yuggoth", Nyarlathotep brings about the end of the world, descibed as "crushing what he chansed to mould in play, the Idiot Chaos blew Earth's dust away". That's pretty vague, but seeing as "Idiot Chaos" probably refers to Azathoth, it likely refers to atleast Class 6, possibly Class X.

You greatly underestimate the ensuing destruction. All of existence is Azathoth's dream. When he wakes up, it will be over. No Earth-Shattering Kaboom, all reality will just be gone.

Dragonlance has one of its characters, Raistlin, try to become a god. After succeeding, he proceeds to dethrone others to get rid of competition, however after he's done kicking all the other gods out of their seats the world is pretty much dead.

In the Wing Commander novel Fleet Action, the Kilrathi on the warpath use Strontium-90 clad thermonuclear weapons to render several planets incapable of sustaining any life, and threaten to do so to Earth until Max Krueger's Big Damn Heroes moment.

As The Curtain Falls is set billions of years in the future, during one of these. Due to the Sun's expansion into a Red Giant (which will later lead to a Class X2), Earth's atmosphere has boiled away and life can only exist on the beds of dried up oceans. Soon, everything will be dead. Also, much of Earth's surface is covered with deserts made of tiny bits of degraded plastic.

In Poul Anderson's After Doomsday, Earth. This proves to be a clue. The culprits were not biochemically compatible with Earth, and would have had to slag it down to reseed it anyway, after they disposed of humanity.

In Doom: Endgame, Fredworld experiences a planetary desolation at the hands of the Newbies. It takes Fly and Arlene half a day to find a corpse to resurrect and Arlene is the first to notice the planet is completely silent and still.

In Animorphs #28. The Experiment, the titular characters are speculating on what the invadingparasitic Yeerks are planning to do with a meatpacking plant; Cassie suggests poisoning the food supply, but Ax, the resident alien, corrects her by pointing out that if the Yeerks wanted to kill many people, they could simply use their Dracon Beams to ignite the atmosphere, incinerating it completely and wiping out all life on Earth. An uncomfortable silence ensues.

Planet Earth in Chrysalis was completely scoured to lifelessness by the multiplanetary Xunvir Republic a few hundred years before the start of the story, an event which sets off the once-human Terran's plot to avenge humanity for the future it was robbed of.

Live-Action TV

The Doctor Who episode "Planet of the Dead". The resort planet San Helios was devastated and reduced to a desert by a Horde of Alien Locusts, which then create a portal to another world. Before the Doctor interfered, Earth was next on the menu.

From the classic series, the Jungle Planet Kembel from The Daleks' Master Plan is reduced to a lifeless dustball by the effects of the Time Destructor.

Professor Stahlman's project in Inferno unleashed a volcano that (reportedly) wiped out all life on Earth.

Stargate SG-1 has the Dakara Superweapon, a wave that can reduce targeted matter (like organic life) to its basic components, effectively eliminating all such targets on the planet. If fired through the stargate while it's active, it can affect another planet. If the entire network is active, the wave can affect the entire galaxy.

In Star Trek: The Original Series, there's Starfleet General Order 24, which allows a captain to effectively blast a planet clean of life. Kirk invokes this in the episode "A Taste of Armageddon" when the people of Eminiar attempt to force him and his landing party into a suicide chamber of sorts as part of a treaty towards a neighboring planet in a disturbing alternative to war. The Eminiar leader, Aman 7, is forced to rein on this idea when he realizes Kirk ain't bluffing and, thankfully, Kirk doesn't go through with it.

The planned bombardment of the Founder homeworld in the Star Trek: Deep Space Nine episode "The Die Is Cast" had it not been a trap apparently would have involved destroying the planet's crust and mantle. Well, at least the core would have still been there.

This is what essentially happened to Mal's homeworld of Shadow during the Unification War in the backstory of Firefly.

And Earth itself, really the catalyst for the entire series universe, albeit via pollution, and over a very, very long time.

Babylon 5 has the Shadow Planet Killers aka Death Clouds. They use thousands of high-yield thermonuclear missiles which burrow into the planet's core and detonate in unison, reducing the entire crust of a planet to slag while Nanotech sucks away all useful energy in the process. While this is arguably more psychologically horrific and excruciating, its Vorlon counterpart actually sits higher up the scale at Class X.

In the Star Trek: The Next Generation episode, "Datalore", the Crystalline Entity was an interstellar entity that absorbed all organic life as it traveled through space. The crew determines that Omicron Theta (the planet Data's creator, Dr. Soong, settled with his scientific staff) was attacked by the entity and "nothing survived, not even soil bacteria". The crew visit it and find a dead world, with only the remnants of Soong's base still functioning (along with Data's deactivated and disassembled brother.

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In Egyptian Mythology the snake god Apep wants to kill the Sun God Ra and put out the sun. This would kill off all life on Earth.

Tabletop Games

The "Crucible Of God" scenario in Vampire: The Masquerade's final supplement ends in this if the PCs lose; thanks to the war between humanity, vampires, and the Antediluvians, all life has been scoured from the face of earth, leaving it completely barren and devoid of even the most basic forms of life. Appropriately, the only survivors are the unliving vampire player characters, who either drain each other dry in a futile attempt to survive, lapse into a torpor that will never end, or kill themselves via sunlight.

Some of the more extreme forms of Exterminatus, including the most nasty virus bombs (the attack on Tallarn not only killed and disintegrated everything, it killed the microorganisms needed to break down and recycle the resulting horrible sludge of life. People in virus-proof bunkers survived, but the same thing happening to a place without those would be a definite Class 5).

Another variant essentially blows the entire crust open and turns the entire planet into a ball of lava. Ouch.

When the Tyranids finish with a planet, not only is it left a lifeless, airless, barren rock, but it's also significantly smaller than it was before the Tyranids started — the bugs eat everything organic or consumable on the planet, down to the bedrock, and drain the heat from its core.

Necrons kill everything. Everything. Down to bacteria. Specifically, we have the World Engine, a Death Star-like capable of turning every single living thing on a planet into a cloud of atoms with a single shot.

The so-called "Tombworlds" are planets stripped of all life by the Necrons in ancient times to make them suitable for long-term Necron occupation/hibernation. Some of them were unknowingly terraformed by humans millions of years later.

In the Dungeons & Dragons Splat book Elder Evils, this is the most likely worst case scenario for Atropus, the World Born Dead. Should the players lose, his evil necromantic influence would turn the game world into a lifeless husk overrun with the undead.

Video Games

Radiant Silvergun starts with a stone monolith known as the Stone-Like awakening and releasing a blast of energy that kills absolutely everything on the planet. Four humans aboard the ship Tetra escape into orbit and return a year later due to running out of supplies. These remaining humans die too.

Halo: Glassing - bombarding a planet with plasma until the whole surface turns into "glass" - is capable of this, but it takes a lot of time and energy to do, so the Covenant mostly just do partial glassings (which are still often enough to pull off a Class 6).

In Star Control II, The Shofixti race use their own sun as a kamikaze bomb, killing all but 18 Shofixti (2 male, 16 female) and utterly ruining their solar system (but hey, they destroy a third of the Ur-Quan fleet!). Amusingly, those 18 Shofixti were able to repopulate their species in three months. Not nearly as amusing are the Mycon Deep Children, which take Earth-like worlds and turn their crust inside out, transforming it into a "Shattered World" uninhabitable to all but the Mycon.

In Star Wars: The Old Republic and its tie-in novel Revan, it's revealed that the Sith Emperor once did the same thing to his homeworld, on an even more thorough level. To the point that the entire planet is akin to a void in the Force, which is said to be deeply disturbing to any Force-sensitive that visits it. The Emperor intends to someday repeat the process on a universal scale, absorbing all life everywhere and effectively becoming the Force in the process.

The world of Armored Core 4 is gradually being poisoned by the massive amounts of radiation being released into the planet's atmosphere beceause of the wanton overuse of Kojima weapons, which are weapons that utilize Kojima Particles, a newly discovered particle which allows for a practically limitless source of energy, at the cost of tremendous ecological impact.

By the time the sequel, Armored Core 4 Answer, finally rolls around, most of the world is already barren desert, entire regions have been abandoned because of Kojima contamination and over half of humanity now lives in Cradles, huge flying cities cruising at an elevation where the atmosphere is still safe enough to breathe, at least for now.

The Corporations even know full well that the Cradle System is just a stop gap measure, and that the entire atmosphere will eventually succumb to irradiation. But even before that, the Cradles will eventually be pushed to a high enough elevation that the automatic Kill Sats they placed earlier will eventually detect the cities as a threat and fire at them with their cannons.

Persona 2: Nyarlathotep wins, Humanity ends. Sumaru City exists alone in a barren landscape. There is nothing beyond... but there's a way out, if you're sure you wanna pay the price...

The Bad Endings of Persona 3 and Persona 4. In the former, Nyx devours the Shadows of all living things, leaving them as Empty Shells. Robots like Aigis are still alive, but the world remains in the Dark Hour forever. In the latter, Izanami decides that humanity desires emptiness, and engulfs the world in fog. The Midnight Channel merges with the real world, and humans are either killed by, or turn into their Shadows.

Happens to Vasuda Prime in FreeSpace, due to orbital bombardment with Shivan beams. The Vasudan species survived due to a number of colonized systems and a massive evacuation of the planet beforehand (though around 4 billion still died during the bombardment). Also happened to the Ancients' home system in the backstory, and the game ends with the player's squadron just barely stopping the same thing from happening to Earth.

It actually almost happened twice. At the beginning of the GDI campaign of Firestorm, a scientist mentions that if they won't do anything, Tiberium biosynthesis will make the planet inhospitable to carbon-based life in less than a year. Fortunately for everyone, GDI got their hands on the Tacitus and figured out the effect of sonic weapons on Tiberium. Then after the third game, the planet was once again heading towards this... until Kane decided to give the Tacitus' copy to GDI and helped them build the Tiberium Control Network.

The Scrin's modus operandi is somewhat similar to the Tyranids from Warhammer 40k: drop Tiberium onto an inhabited planet, wait a few decades until the whole surface is consumed including native life then swoop down and harvest, leaving a barren rock behind.

In AdventureQuest Worlds, this was the ultimate plan of Chaos Lord Ledgermayne, the Big Bad of the Arcangrove saga, by cutting off the Para-Elemental Plane of Magic from Lore. Since magic is tied to life itself, this would have resulted in the end of all life in the world of Lore. Ledgermayne was stopped by The Heroand Drakath himself before he could bring this plan to pass.

In Runescape, Goblins used to live peacefully on a colorful swamp world called Yu'biusk. Then the war god, Bandos, found it. After thousands of years under Bandos' rule, the ground is black and scorched, the sky is smoky and dark, and the water looks like it could kill you just by you touching it. The entire world has been deserted, desolate, and ravaged. It's a bit depressing.

This is the goal of the Old Gods in World of Warcraft, bar themselves and their minions (although they arguably don't count as alive anyway, being said to be "outside the cycle"). The dungeon End Time takes players to a Bad Future where this has happened, where the Old Gods' Dragon(pardon the pun) Deathwing has even killed himself. It's implied that this is the best possible end of the world for Azeroth!

Murozond: I have witnessed the true End Time. THIS? This is a blessing you simply cannot comprehend!

In Ultima VI you can learn the 8th-level spell "Armageddon" - indeed, you must learn it if you wish to be able to learn any other 8th-level spells. If you ever cast it, everything in the world dies instantly, including you. The incorporeal creatures you learn this from mention having traded it to another world once before, and contact with that world was lost shortly afterwards. They don't quite understand why, but hypothesise that someone may have "misused" the knowledge.

In Dawn of War: Dark Crusade the Necrons do this if they win, Kronus is made a barren dead planet, and they're very thorough with it, all plant life die, the waters disappear, even microscopic bacteria are killed from the energies the Necrons emit from their structures.

In A New Beginning, Earth's future, which is presently in Class 2, will soon become Class 6 thanks to a depleted atmosphere and an imminent solar flare.

The moon in The Legend of Zelda: Majora's Mask has enough force to completely envelope the world in a sea of fire if it crashes into Termina (most likely due to a magical influence). The result of the destruction would likely wipe out all forms of life.

In the Mass Effect franchise there are a number of former garden worlds where all life has been wiped out, usually as the result of orbital bombardment most likely carried out by Reapers.

The Bad Ending of Undertale has the Fallen Child, now hugely empowered by slaughtering everything in the Underground and able to escape to the surface, annihilate the entire world. They ask if you, the player, want to do it—either way, they stab you to death and do it. But trying to refuse makes it significantly more terrifying. Achieving this ending also taints every other playthrough, including the Golden Ending, by implying that the Fallen Child's soul will still make this happen no matter how many times you reset.

Just before the final boss fight of the Neutral Route, Photoshop Flowey reduces the setting to a black void containing just himself, the six SOULs and you, as the first show of his newfound power.

In Homeworld, the planet of Kharak is bombarded with Low Orbit Atmosphere Deprivation weapons shortly after the Mothership makes its first hyperspace jump. From what we see, these weapons ignite a planet's atmosphere, setting the whole surface on fire. The bombardment is so thorough that anything living on Kharak was sure to have perished, if not from the massive conflagration then from the lack of a breathable atmosphere left in its wake. This prompts the Kushan to press onward with their journey to search for their home.

Karan S'Jet: [shocked and horrified] Kharak is burning...

The world of Horizon Zero Dawn seems at first to be the results of a Class 2 apocalypse; there are primitive tribes of humans as well as natural flora and fauna, but the world has actually gone through a full Class 6. The Robot War completely destroyed all life on earth, and only after said robots were shut down was life re-seeded across the globe.

Primitive species in the Atomic or Early Space Age may eventually evolve into full-fledged starfaring empires. Sadly, it's much more likely they'll instigate a nuclear world war instead that can have different outcomes, the most common of which results in the total annihilation of their planet's biosphere. The same can also happen through alien-made global warming. Both cases come with a depressing message from your observing scientists that they're dismantling their orbital observation post because there's nothing left to observe. Since the devs seemingly want to make sure absolutely nobody misses this particular hint, a pre-FTL Earth appears to have an even higher chance to suffer this fate than generic alien planets.

But of course, you still can do it yourself. One of the DLC's added a "Colossus" ship class, giant but unarmed except for one weapon, that takes a while to charge and can only be commanded to fire on planets. Effects span a range, from humane solution (encasing the planet in an unbreakable shield to cut it off from the rest of the galaxy or simply brainwashing everybody into spiritualist seekers) to Class 6 extermination (Neutron Beam simply wipes out most of the life on it leaving it open to colonization while Nanomachine Diffuser turns all biological population of the planet into cyborgs loyal to your empire for The Assimilator types). And finally World Cracker inches into Class X by breaking the planet open - though it isn't entirely gone and the pieces float together, the most you can do is put a mining station on it, as colonization is rendered impossible.

One of the endgame crises, Prethoryn Scourge, infests planetary biospheres to such degrees that you have to completely scour it clean in order to take the planet back. You don't need the aforementioned Colossus ships, a normal fleet can do, given enough time. It leaves the planet as a barren rock that can be terraformed back to habitability. Essentially, the planet suffers Class 5 followed by infestation and Class 6 if you take it back.

Lastly, another endgame crisis, the Extradimensional Invaders, turn any planet they successfully invade with ground forces into a Shrouded World, and there's no coming back from this one - the planet is so utterly corrupted with Shroud energies that not even the most advanced terraforming technologies in the galaxy can make it habitable to corporeal beings ever again. Needless to say that anyone still on the planet when it's transformed is killed instantly, their souls and bodies used to feed the invaders' endless hunger.

Webcomics

At the conclusion of the Revenge of the Sith arc in Darths & Droids it was discovered that the Trade Federation had begun construction of the "Peace Moon" by forging the entirety of Naboo. The biosphere was completely destroyed while the planet's surface was transformed into a volcanic wasteland.

Spacetrawler: The unclamped Eebs melt the surface of planet Carpsellon to slag. They do the same to several other planets, off-screen.

The duplicate Earth that SCP-2935 leads to has already undergone a Class 6. Even supposedly unkillable SCPs like 173 and 682 are dead. And if you go back through the portal, it happens to the Earth you came from as well.

Western Animation

In the Futurama episode "The Late Philip J. Fry", Fry, Bender and the Professor end up in the year 1 billion, where all life on Earth is extinct and only an empty, desolate plain remains.

On Ben 10: Alien Force, Paradox shows the heroes a possible future where a time-warping entity has caused everything on Earth to age into dust. He claims it's their best possible future if the entity isn't stopped.

Might have happened on Gargoyles, when Jackal became host to the death-godly power of Anubis, had his "Purge" not been stopped.

Steven Universe showcased Gem Colonies as being highly detrimental to the host planet itself. The Earth has local spots drained of all life-supporting resources to create more gems (which seem to keep draining whatever is put there). Should the colony become successfully established, the result would be an Earth fit for Gems to live on, but the planet no longer hosts organic life—it wouldn't even have any water. Even worse, when considering the murals of the Diamonds, this event must have happened many times to other life-bearing planets, potentially including Homeworld itself.

Real Life

Scientists predict that the Sun's luminosity gradually increases; in about a billion years, Earth will become too hot to sustain lifenote Complex life at least, that could last some more time (1.2 billion years). Simple lifeforms -bacteria and the like- may last until 2.8 billion years in the future.

Possible example of what the future may hold for Earth: our nearest neighbour, Venus.

Venus is hotter than it should be though, due to the cloud cover. Scientists have actually hypothesized that if they could blow off enough of the atmosphere, the poles would be able to sustain human life.

And it could be worse than Venus. In about 3.5-4 billion years, the Sun's increasing luminosity may induce a greenhouse effect so powerful that Earth's surface temperature may rise enough to melt rocks. And this is still a billion years before the Sun becomes a Red Giant.

Perhaps there's some hope for life; while Earth's surface may be too hot to sustain life, there's a lot of water in the deep crust and mantle that could maintain it (albeit at a very simple level; i.e. bacteria and very little, if any, more complex) there. Also, the future Venus-like Earth and the hellish Earth depicted above respectively depends of the level of tectonic activity and the amount of water in Earth's atmosphere. If tectonic activity is low enough (or stops) and there's little water remaining these two scenarios could be avoided, so life could still be around until the Sun started its path to become a Red Giant.

In about three billion years, our galaxy will collide with the Andromeda Galaxy. That could destroy our planet in two possible ways, even though most likely the sun itself will escape intact. One way is that colliding nebulae will generate new rounds of star-formation nearby, leading to frequent supernova explosions. The other way is that our stellar orbit around the galaxy will be altered. This could destroy the solar system if the sun is sent into either the galactic nucleus, or into a globular cluster.

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